LT 2000
LINE
TESTER
LEVEL GENERATOR - SELECTIVE LEVEL METER - REFLECTOMETER
ALL IN ONE HANDHELD BATTERY-POWERED PACKAGE !
ATEN has developed this easy to operate and cost effective instrument for field operation,
to verify the quality of copper pair for analog and digital transmission up to 2 Mbit/s.
The LT2000 can perform following measurements:
NOISE - LEVEL - ATTENUATION - CROSSTALK - RETURN LOSS
for various transmission systems:
•Base band •160 Kbit/s •1,5 Mbit/s •2 Mbit/s •HDSL •ADSL
APPLICATIONS
NOISE & LEVEL METER
With one LT2000 at one side of the line.
ATTENUATION METER
With two LT2000 at the opposite sides of the line.
CROSSTALK METER
• With one LT2000 at one side of the lines;
• With two LT2000 at the opposite sides of the lines.
RETURN LOSS METER
With one LT2000, to measure the level of echo-signal
caused from the impedance mismatching of the line.
LONGITUDINAL BALANCE METER
With one LT2000 and a special adapter, to measure the
balance attenuation of the line referred to ground or other
conductor.
SPECIAL FEATURES
• AUTOMATIC MEASUREMENTS IN SWEEP MODE
- RMS Noise level readout on programmed wide-band;
- Return loss: frequency & level readout of min. and max.
echo level;
- Near Cross-talk: frequency & level readout of min. and
max. cross level.
• INTERCOMM facility between a local and remote user,
using the line under test.
LT2000 - TECHNICAL CHARACTERISTICS
General
Case.....................................................: ABS.
Connections.........................................: • input connector "RX" triple banana jack (a-b-Gnd);
• input/output connector "TRX" triple banana jack (a-b-Gnd);
• polarized connector for external supply and batteries charger;
• RJ-45/4 connector for headset interface.
Display .................................................: alphanumeric LCD - 4 lines x 16 characters.
Keypad.................................................: micro-switches under polyester membrane film.
Power supply .......................................: • NiMh internal rechargeable batteries (green), ≥ 3 hours of operating time;
• external: 11 to 32 Vdc / 1,5 to 0,6 A.
Ambient temperature ...........................: operating: 0 ÷ 50° C; storage: -10 ÷ 60° C.
Dimensions ..........................................: 100 x 40 x 210 mm.
Weight..................................................: < 1 Kg.
Level Generator
Output impedances..............................: < 10 Ω, 150 Ω
(120 or 135 Ω on request),
600Ω balanced (≈ 5µF series).
Output frequency bands ......................: 200 Hz ÷ 2 MHz.
Resolution............................................: 1 Hz from 200 Hz up to 10 kHz; 100 Hz from 10 kHz up to 2 MHz.
Frequency accuracy/stability ...............: ≤ ± 50 ppm.
Harmonic distortion .............................: ≤ 0.5 %.
Output level..........................................: 0.0 dBm ± 0.2 dB @ 10 kHz.
Output Level accuracy vs. frequency (referred to 10 kHz):
-2 ÷ -1 dB
-1 ÷ -0.5 dB
Zo Out 600 Ω
Zo Out 120÷150 Ω
200 Hz
300 Hz
-0.5 ÷ -0.2 dB
± 0.1 dB
± 0.3 dB
200 Hz
800 Hz
800 kHz
2000 kHz
600 Hz
2 kHz
800 kHz
2000 kHz
Selective Level Meter
Input impedances ................................: 150 Ω
(120 or 135 Ω on request),
600 Ω, ≥ 200 kΩ balanced (≈ 5µF series).
Tunable frequencies ............................: tracking with TX frequency (200 Hz ÷ 2 MHz).
Resolution............................................: 1 Hz from 200 Hz up to 10 kHz; 100 Hz from 10 kHz up to 2 MHz.
Tuning accuracy / stability ...................: ≤ ± 50 ppm.
Selectivity (fo ≥ 800 Hz).......................: ≤ -0.5 dB @ ± 30 Hz fo; ≥ -50 dB @ ± 500 Hz fo.
Level measurements ...........................: absolute (dBm) and relative (dBr).
Input range...........................................: ≤ -100 ÷ +5 dBm / resolution: 0.1 dB.
Hybrid circuit - Return Loss .................: ≥ 40 dB with nominal load.
Noise floor (TX off)...............................: ≤ -100 dBm @ 600 Ω; ≤ -95 dBm @ 120÷150 Ω.
Intrinsic cross talk ................................: ≤ -90 dBm @ 1.000 MHz.
: ≥ 60 dB (fo ≥ 800 Hz).
Freq. image / spurious rejection
Level accuracy vs. input level (referred to 10 kHz):
I← - - - - -
± 0.3 dB
Zo In 600 Ω
Zo In 120÷150 Ω
+5 dBm
+5 dBm
± 0.2 dB
0 dBm
0 dBm
± 0.5 dB
-70 dBm
-70 dBm
TX OFF
± 1 dB
-85 dBm
-80 dBm
- - - - - →I
± 2 dB
-95 dBm
-90 dBm
-100 dBm
-95 dBm
Level accuracy vs. frequency (referred to 10 kHz / 0 dBm):
-2 ÷ -1 dB
-1 ÷ -0.5 dB
Zo Out 600 Ω
Zo Out 120÷150 Ω
200 Hz
300 Hz
-0.5 ÷ -0.2 dB
± 0.1 dB
± 0.3 dB
200 Hz
800 Hz
800 kHz
2000 kHz
600 Hz
2 kHz
800 kHz
2000 kHz
Automatic measurements in sweep mode
Automatic measurements....................: • Noise (or Level): - frequency & level readout of min. and max. noise level;
- RMS noise level readout on programmed wideband;
• Return-loss: frequency & level readout of min. and max. echo level;
• Near Cross talk: frequency & level readout of min. and max. cross level;
Operating programmable bands..........: • “base band” from 200 Hz min. to 10 kHz max.
(1 step/sec. speed)
(100; 200; 400; 1000 Hz selectable step)
• “high band” from 10 kHz min. to 2 MHz max.
(0.1; 0.2; 0.4; 1; 2; 4; 10 and 20 kHz selectable step)
Sweep generator .................................: • “base band” from 200 Hz min. to 10 kHz max.
(10 step/sec. speed)
(100; 200; 400; 1000 Hz selectable step)
• “high band” from 10 kHz min. to 2 MHz max.
(0.1; 0.2; 0.4; 1; 2; 4; 10 and 20 kHz selectable step)
Supplied accessories
• Ac power supply and batteries recharger
• Instruction manual
Optional accessories
LT01 - Softpack carrying case
LT05 - Fixed Balanced Attenuator:
3 or 6 or 10 or 20 or 30 or 40 dB
150 Ω (120 or 135 Ω on request) and 600 Ω
LT02 - Headset
LT03 - BNC to Triple
Banana Jack Adapter
LT06 - Balance Measure Adapter:
150Ω (120 or 135 Ω on request) and 600 Ω
LT04 - Banana / Crocodile cable
LT07 – Resistive Termination:
150 Ω (120 or 135 Ω on request) or 600 Ω.
The informations contained in this document are subject to change without notice
LT2000 - Field application
Near Cross-talk
Noise or Level
measurement
measurement
TX
TRX
RX
?
line under test
Zo
interfering line
Zo
line under test
TRX
RX
Zo = nominal termination 150 (120 or 135) or 600 Ohm
Return Loss
Attenuation
measurement
measurement
TX
Zo
TRX
TRX
TX
RX
line under test
line under test
RX
Zo = nominal termnation 150 (120 or 135) or 600 Ohm
Longitudinal Balance
measurement
Balance Measure Adapter
TRX
TX
Zo
line under test
RX
Zo = nominal termnation 150 (120 or 135) or 600 Ohm
Via dei Lavoratori, 6 – 04010 LATINA ITALY
Tel +39 0773 240.696 - Fax +39 0773 240.676
E-Mail sales@aten.it - WEB http://www.aten.it
TRX
TRX